C++

73,246 students

75 contributors

73,246
students have developed their C++ skills on Exercism.

Students

73,246

Submissions

468,861

Mentoring Discussions

10,457

The C++ track needs attention ⚠️

Building

Build

Use your knowledge to build the C++ track itself

75 contributors

Build Test Runners

Create Test Runners that have the single responsibility of taking a solution, running all tests and returning a standardized output.

Usage statistics

Total Test Runner Runs

420,156

Test Run Pass Rate

18.6% (78031)

Test Run Fail Rate

17.5% (73453)

Test Run Error Rate

63.9% (268672)

Build Analyzers

Build an Analyzer for C++: Exercism's analyzers automatically assess student's submissions and provide mentor-style commentary.

Next goal: Build an Analyzer. Find out more.

Build Representers

Build a Representer: a bit of code that has the single responsibility of taking a solution and returning a normalized representation of it.

Next goal: Build a Representer. Find out more.

Create Practice Exercises

Practice Exercises are exercises designed to allow students to solve an arbitrary problem, with the aim of them making use of the concepts they have learned so far.

Next goal: Implement 132 practice exercises. Find out more.

Usage statistics

59 active practice exercises

Started

Attempts

Completions

Mentoring requests

Hello World

42,838

111,575 (avg. 2.6)

22,348 (52.2%)

12 (0.0%)

Leap

16,184

61,485 (avg. 3.8)

7,884 (48.7%)

2,415 (14.9%)

Reverse String

8,485

50,675 (avg. 6.0)

4,995 (58.9%)

1,409 (16.6%)

Space Age

4,811

34,886 (avg. 7.3)

2,584 (53.7%)

1,057 (22.0%)

Triangle

3,214

21,911 (avg. 6.8)

1,999 (62.2%)

722 (22.5%)

Grains

2,251

13,550 (avg. 6.0)

1,808 (80.3%)

573 (25.5%)

Raindrops

1,893

7,179 (avg. 3.8)

1,649 (87.1%)

479 (25.3%)

Pangram

1,695

11,097 (avg. 6.5)

1,358 (80.1%)

447 (26.4%)

Two Fer

1,641

6,317 (avg. 3.8)

1,346 (82.0%)

74 (4.5%)

Grade School

2,041

13,988 (avg. 6.9)

1,337 (65.5%)

194 (9.5%)

Hamming

3,683

8,273 (avg. 2.2)

2,949 (80.1%)

346 (9.4%)

Nucleotide Count

2,288

10,868 (avg. 4.8)

1,603 (70.1%)

261 (11.4%)

RNA Transcription

1,563

6,039 (avg. 3.9)

1,283 (82.1%)

154 (9.9%)

Collatz Conjecture

1,075

4,553 (avg. 4.2)

890 (82.8%)

43 (4.0%)

Difference of Squares

1,891

4,038 (avg. 2.1)

1,575 (83.3%)

154 (8.1%)

Nth Prime

1,253

6,800 (avg. 5.4)

820 (65.4%)

107 (8.5%)

Queen Attack

1,072

6,526 (avg. 6.1)

697 (65.0%)

85 (7.9%)

Sieve

989

3,464 (avg. 3.5)

737 (74.5%)

100 (10.1%)

Say

1,005

6,037 (avg. 6.0)

528 (52.5%)

96 (9.6%)

Gigasecond

2,280

3,542 (avg. 1.6)

1,522 (66.8%)

250 (11.0%)

Secret Handshake

602

2,536 (avg. 4.2)

470 (78.1%)

27 (4.5%)

Allergies

750

3,079 (avg. 4.1)

536 (71.5%)

39 (5.2%)

Protein Translation

565

2,512 (avg. 4.4)

443 (78.4%)

30 (5.3%)

Sum of Multiples

1,044

2,990 (avg. 2.9)

793 (76.0%)

64 (6.1%)

Prime Factors

759

1,887 (avg. 2.5)

571 (75.2%)

41 (5.4%)

Robot Name

995

3,978 (avg. 4.0)

680 (68.3%)

91 (9.1%)

Clock

648

1,750 (avg. 2.7)

364 (56.2%)

37 (5.7%)

Meetup

541

773 (avg. 1.4)

287 (53.0%)

19 (3.5%)

Beer Song

580

2,359 (avg. 4.1)

431 (74.3%)

31 (5.3%)

Atbash Cipher

551

3,367 (avg. 6.1)

398 (72.2%)

24 (4.4%)

Trinary

646

1,853 (avg. 2.9)

540 (83.6%)

18 (2.8%)

Binary Search

551

2,495 (avg. 4.5)

368 (66.8%)

28 (5.1%)

Phone Number

706

1,950 (avg. 2.8)

505 (71.5%)

34 (4.8%)

Series

453

1,616 (avg. 3.6)

335 (74.0%)

16 (3.5%)

Complex Numbers

527

2,021 (avg. 3.8)

343 (65.1%)

14 (2.7%)

Food Chain

696

1,061 (avg. 1.5)

493 (70.8%)

25 (3.6%)

Roman Numerals

508

1,425 (avg. 2.8)

362 (71.3%)

16 (3.1%)

Bob

1,937

3,894 (avg. 2.0)

1,613 (83.3%)

231 (11.9%)

Word Count

1,100

2,556 (avg. 2.3)

846 (76.9%)

82 (7.5%)

Circular Buffer

429

2,144 (avg. 5.0)

242 (56.4%)

30 (7.0%)

Crypto Square

433

1,712 (avg. 4.0)

278 (64.2%)

12 (2.8%)

ETL

1,018

1,710 (avg. 1.7)

828 (81.3%)

37 (3.6%)

Matching Brackets

524

1,920 (avg. 3.7)

380 (72.5%)

24 (4.6%)

Anagram

1,262

2,437 (avg. 1.9)

988 (78.3%)

86 (6.8%)

Binary Search Tree

628

1,880 (avg. 3.0)

175 (27.9%)

27 (4.3%)

Luhn

479

2,385 (avg. 5.0)

347 (72.4%)

27 (5.6%)

Acronym

547

1,576 (avg. 2.9)

397 (72.6%)

25 (4.6%)

Armstrong Numbers

532

1,560 (avg. 2.9)

417 (78.4%)

20 (3.8%)

Binary

811

2,159 (avg. 2.7)

627 (77.3%)

76 (9.4%)

Hexadecimal

611

1,434 (avg. 2.3)

454 (74.3%)

57 (9.3%)

Isogram

2,054

2,945 (avg. 1.4)

1,223 (59.5%)

87 (4.2%)

Pascal's Triangle

502

1,272 (avg. 2.5)

371 (73.9%)

20 (4.0%)

Scrabble Score

852

1,909 (avg. 2.2)

615 (72.2%)

78 (9.2%)

All Your Base

489

1,390 (avg. 2.8)

299 (61.1%)

34 (7.0%)

Robot Simulator

851

2,424 (avg. 2.8)

447 (52.5%)

44 (5.2%)

Bank Account

109

296 (avg. 2.7)

38 (34.9%)

9 (8.3%)

Darts

78

229 (avg. 2.9)

54 (69.2%)

3 (3.8%)

Largest Series Product

47

177 (avg. 3.8)

32 (68.1%)

2 (4.3%)

Isbn Verifier

81

397 (avg. 4.9)

56 (69.1%)

2 (2.5%)

73 unimplemented practice exercises

Affine Cipher

Alphametics

Book Store

Bottle Song

Bowling

Change

Connect

Custom Set

D&D Character

DOT DSL

Diamond

Dominoes

Error Handling

Flatten Array

Forth

Go Counting

Grep

Hangman

High Scores

House

Killer Sudoku Helper

Kindergarten Garden

Knapsack

Ledger

Lens Person

Linked List

List Ops

Markdown

Matrix

Micro Blog

Minesweeper

OCR Numbers

POV

PaaS I/O

Palindrome Products

Parallel Letter Frequency

Perfect Numbers

Pig Latin

Poker

Proverb

Pythagorean Triplet

REST API

Rail Fence Cipher

Rational Numbers

React

Rectangles

Resistor Color

Resistor Color Duo

Resistor Color Trio

Rotational Cipher

Run-Length Encoding

SGF Parsing

Saddle Points

Satellite

Scale Generator

Simple Cipher

Simple Linked List

Spiral Matrix

Square Root

State of Tic-Tac-Toe

Strain

Sublist

Tournament

Transpose

Tree Building

Twelve Days

Two Bucket

Variable Length Quantity

Word Search

Wordy

Yacht

Zebra Puzzle

Zipper

1 foregone practice exercise

Point Mutations

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1,760

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